Preparation of porous geopolymer from biomass ash for synthetic dye adsorbent

In this study, porous geopolymer was synthesized using rice husk ash and metakaolin as geopolymer precursor and H2O2 as foaming agent through 23 full factorial experimental design with center point replications to evaluate effects of Si/Al ratio of geopolymer precursor (1.5; 2.5; 3,5), molar ratio o...

Full description

Saved in:
Bibliographic Details
Main Authors: Rosmayanti, Irna, Maryani, Eneng, Samadhi, Tjokorde Walmiki
Format: Conference Proceeding
Language:English
Subjects:
Adsorbents
Aluminum
Ashes
Design of experiments
Foaming agents
Fourier transforms
Geopolymers
Hydrogen peroxide
Metakaolin
Precursors
Silicon
Sodium silicates
Synthesis
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, porous geopolymer was synthesized using rice husk ash and metakaolin as geopolymer precursor and H2O2 as foaming agent through 23 full factorial experimental design with center point replications to evaluate effects of Si/Al ratio of geopolymer precursor (1.5; 2.5; 3,5), molar ratio of Na2SiO3/NaOH in alkaline activator (2.0; 2,5; 3.0) and concentration of H2O2 (0.3;0.6; 0.9)%-wt. Performance testing of porous geopolymer was carried out through the adsorption of Indigo Carmine at contact time of 24 hours. The morphological properties of the porous geopolymer were studied by using X-ray diffraction and Fourier transform infrared. Results show that porous geopolymer exhibited good properties as adsorbent a generally amorphous structure. It was observed that the geopolymer synthesized at Si/Al ratio of 1.5, Na2SiO3/NaOH ratio of 2.0, and 0.9%-wt of H2O2 exhibited highest removal efficiency of Indigo Carmine up to 94.8%. Si/Al ratio and Na2SiO3/NaOH ratio showed significant effect to Indigo Carmine removal by porous geopolymer.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0206683